This two-digit digital pressure gauge was found in the 1992 special edition of Radio Electronics Experimenter. A/D converter integrated circuits are uncommon today.
We found this circuit in the magazine Eletcronics Now of July 1994. The power supply is according to...
This circuit uses the 7815 regulator to obtain a voltage for motor control num shield for PC. The...
This simple Philips circuit from the 1960s can use any general-purpose transistor. The signal is...